2		4				5
8				1
		2			4	6
	7	1			8
			8				6
	4				6		2

Difficulty: Medium (0)

				4
						8
3			6	8
	1					3	5
6	2					5
			5	3			2
	6
			1

Difficulty: Easy (0)

7		5		4
	4			5		3
		3		1	4		7
8		1	4		2
	6		8			1
			1		8		6

Difficulty: Super easy (0)

	8					7
3
					6	4
6				7			8
8			4				2
	5	1
							4
	3					1

Difficulty: Very easy (0)